res/layout/frag_call_incoming.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:orientation="vertical" >

        <TextView
            android:id="@+id/textView1"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_margin="10dp"
            android:text="Incoming call"
            android:textAppearance="?android:attr/textAppearanceMedium" />

        <TextView
            android:id="@+id/contact_name_txt"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentLeft="true"
            android:layout_below="@+id/textView1"
            android:layout_margin="10dp"
            android:layout_marginTop="76dp"
            android:text="Caller Name"
            android:textAppearance="?android:attr/textAppearanceLarge" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:orientation="horizontal" >

        <Button
            android:id="@+id/decline_btn"
            android:layout_width="wrap_content"
            android:layout_height="120dp"
            android:layout_weight="1"
            android:background="#FF4444"
            android:text="Decline" />

        <Button
            android:id="@+id/accept_btn"
            android:layout_width="wrap_content"
            android:layout_height="120dp"
            android:layout_weight="1"
            android:background="#99CC00"
            android:text="Accept" />
    </LinearLayout>

</RelativeLayout>